Is your BMW smoking blue-white on idle?
Did you notice that after your BMW engine idling for a short period of time at the first few revs a cloud of blue-white smoke is coming out of the exhaust tailpipe?
Is your engine using oil?
Models affected:
The models affected are the N62, N63 engines that are used in the X5’s, 5,6 and 7 series.
CAUSE:
- The first thing that can go wrong is the Oil Separator causing excessive vacuum in the crankcase which will then cause the oil to be sucked into the intake and burned;
- The second and most common issue is the faulty valve seals that harden due to the age and heat they sustain while the engine is operating, and oil gets past the valves causing oil consumption issues and smoking.
SOLUTION:
- The oil separator (known as engine breather) if faulty is an easy fix.
- Instead, the valve stem oil seals replacement is a comprehensive job, usually involving removing cylinder heads to access valve springs and then valve oil seals. For the N62 engines, this job consists of about 30 hours of labor plus parts, which can work out a small fortune in money or time. On top, you have to make sure before starting this job, timing settings will be done correctly, and to do it, you also need special tools.
You can see here a BMW X5 M with this problem:
Here at OGS Mechanics we have the right equipment which will allow us to perform valve steam replacement without removing cylinder heads reducing this way costs to less than half of what it means first option.